Adjustable clamp.



J. RIVERS.

ADJUSTABLE CLAMP.

APPLIoATIoN FILED 1120.16, 19o?.

Patented Sept. 15, 1908.

nunnnnnnuunr VTo all/whom it may concern:

UNITED STATES. PATENT yOFFTOE.

JOHN RIVERS, OF DETROIT, MICHIGAN.-

ADJ'U STABLE CLAMP.

Specification of Letters Patent.

Patented sept. .15, 19'08.

Application led December 16, 1907.' Serial No. 406,686.v

it known that I, JOHN RivEns, alsubject'of the Czarof-Russia, having declared fmy'jintention. to become a citizen of the U'ii1ted"Sta-tes, residing at Detroit, .in the county of Wayne and State of Michi an, have invented certain new and useful gimprovements in Adjustable Clamps, of which the following is a specification."

My invention has for its object certain new and useful improvements in an'adjustable clampof superior construction, efiiciency,

and utility; and it consists of the construe? tion,- combination andarrangement of d'e-.

vices 'and appliances hereinafter described.

and claimed", and illustrated' in the accompanying drawings, in which' Figure1. is Aa view in elevation, showing parts'in section;- Fig. 2. is a viewin section on the line 2-2 Fig. 1.

Fig.` 4. is la view in transversel section of the bushing. Fig. 5. is a vienty in transverse section of thetoothed rod. Fig. 6. is a view similar to Fig. 2, but showing a modification. Myinvention is adapted for a variety of uses wherever an adjustable clamp and a quick adjustment thereof is required. Thel provision for quick adjustment of the device is a prmcipal-feature of my invention.

I carry out my invention as follows: In

` thedrawings my improved adjustable clamp is shown having any suitable frame provided with a iXedarm a, and a fixed head b provided witha threaded orifice c, a web d connecting lsaid arm and' head. The arm and I 4, head project'laterally from the web. Within the threaded orifice c, is an' exteriorly threaded bushing e, through which is passed a rodj" provided with ytransversely elongated teeth g, arranged in longitudinal rows as upon opposite sides thereof. The teeth g are not continuous but are arran ed -with elongated grooves or spaces h, there etween. I.pre'fer that the teeth'- g, should extend in a straight linetransversely of the rod, as shown, and of a su'iicient length to make them strong and durableand to afford firm engagement with the bushing.' 'The bushing has interior flanges shown at i, arranged in corresponding longitudinal rows. The in- `terior flanges of the bushing are not made continuous thereabout, but are s aced to form grooves y', on the opposite si es of the bushing, so arranged that the teeth of the rod may pass longitudinally through the grooves Fig. 3. is a view in longitudinal section on the line 3 3 Fig. 2.

of the bushing without engaging the langes'of the bushing, when it is desired to move the rod freely through the bushing, in securing' its proper adjustment upon the'work. The'interior flanges of the. bushing Iare elongated transversely ofthe bushingto afford a strong contemplates so elongating the'flanges ofthe 'bushing asto preventany such lia ilty. It has. been found lthat in tightening-the rod inplace u on the work, inanalo'gous constructions, t e'liability of the accidental disengagement'of the teeth.of the rod from the flanges of the .bushing'i'equires that spe.- cial provision should be made, other than .above'described, to prevent any `such liabiliity. To this endl prefer to turn or curve downward the extremities of the inner flanges of the bushing adjacent to the corresponding grooves j, as ,shown at k. It will be'understood that the strain is upward and consequen'tly that by turning down thewextremit1es of the inner flanges of the bushing an accidental disengagement of the teeth o the rod from the bushing will be prevented.

Each set or row of the interior anges of the bushing has their inner ends connected by a corresponding elongated rib l. When the teeth of the rod are engaged with the' flanges of the bushing and abut' against the corres onding ribs the bushing will be turned in tiie head, 'by the further revolirtions ofthe rod to tighten it freely upon the'vork. When the teeth of thel rod are disengaged from the inner iiangesv of the bushing, the rod may `pass freely through the grooves of the bush- 1ng. The teeth of the Irod and the grooves of the bushing being in alinement, permit the rod to be adjusted freely as the t ickness of the work may require. I f this adjustment has been accom lished, by turning the rod in the right directlon, its teeth will engage with the flanges of the bushing to tighten the device upon the work. The work, it will be understood, is located between thearm a of the frame and the 'adjacent end of the rod. I

than two sets of iianges, as I do not limitmy- 'selfA to any specific number of the rows 'of anges on the bushing and rod.

' Y It will be apparent that in turning the 1t .be desired, lIlr'ovi e the interior of the bushingwith ad posite side -of the ribl from the corres onding -bushing downward in.v engaging the device u on the work, it may be desirable to retract t e bushing in the head of the frame in order to rengage thedevice upon different pieces of work To enable the o erator to'accom lish this result in a s ee y manner, should tional ledges 'g on the op- 'mnei iianges. This provision`ena les the operator to 'simply reverse his rod, thereby endggagirigv the teeth of the rod with the the bus le es of the bushing and thereby to turn lnn back in its threaded engagement 'in 'the hea then when the bushing` has been suiiciently turned back, by reversing the rotation ofthe rod, it will be in osition to enga e the flanges h of the bushing. f

j t Will be understood that'the parts of the clamp may be' made in any suitable size, thickness, or length, and that the teeth of the rod and the i'langes ofthe bushing may also' be made .of any. desired size, thickness, 'or length, in accordance with the pressure required. The rod maybe made to (()perate` left or right handed, as may be desire The quicknessof adjustment is the strong-point of m rably ocated on a line para invention. The led es g are referlglel with t e surface of the downwardly turned extremities of the li es i to facilitate the` engagement of the teet of the rod with the anges 'i when 'the rod is reversed toA engage the work.

What I claim as myinvention is; l l 1. An adjustable clamp Vcomplismg a frame having a xed'arm and ahead,- a bush ing ha a threaded 'engagement in the head provlded with rows o interior lianges and separated'lo 'tudinal groovesors aces, a rod provided wlthrows of teeth an sep- Intestimony-Whlfef arated 1Q 'tudinal ooves or' spaces en-' 55 gaged. within the-bus whereby the rod may be moved freely through the bushing to adjust the rod inthe bushing, the interior anges of the`bushingbeing extended transversely of the bushing to constitute rm sup-` orts for the teeth of the rod, the interior angesof thebushing being curved or turneddownward at one extremity thereof, for the'. lpurpose described.

2.'An adjustable clamp .com a frame having a fixed arm and hea' ,a bushing having a threaded engagementin-the head provided with rows of.,interior,ianges and separated lo tudinal grooves ors aces,- a rod provided with rows of teeth an separated longitudinal ooves'o'l' spaces en gaged Within the bus g, whereby the rod may be moved freely through vthe bushing to adjust the rod in the bushing, the interior, ianges'pf the bushi being extended .trans- 75 versely of the bushlng to' constitute liirm supports for .the `teeth ofthe rod, and al, longitudinal lib connectin the inner extremities of each row of sai interior flanges" withinpthe bushing, the .interior flanges 'o f 80 the bushing being curved' cr turned downward at'their extremities opposite the lcorresponding ribs, for the urposedescribed.

3. An' adjustable c amp com a frame having a fixed arm and hea a bush- 85 ing having a threaded e agement in-the-l 'head providedfwith rows interior. flanges t and separated longitudinal grooves or s aces, f; v a rod vprovided with rows of teeth an sep-l arated lo `tudinal O Oves-.o'r spaces en-i gaged within Vthe bus 'ng,whereby the rod may be moved-freel through the bushing' to adjust the rod in t e bushing, the interior flanges of thebus being extended transversely of the bushi tocon'stitutefirm sup- 95 ports'for-the t'eetho thejrod, alongitudinal rib lcomiecting".the i erextreinitiesof eachfM row of said interior angeswithin the bush?` ing, .and led es projecting from thej'corfresponding o'ntheopposite side thereof. 100 fromsaid ianges for thepnrpos'dsclibeg I havesignedthigfspecification in preseneeof. two

' v`.reins amalis'.

witnesesgf f .N. S. WRIGHT,

' FRANK A. NOAH. 

